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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8395) Text shell command unnecessarily demands that a SequenceFile's key class be WritableComparable
Date Sat, 12 May 2012 02:03:53 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13273798#comment-13273798
] 

Todd Lipcon commented on HADOOP-8395:
-------------------------------------

Seems reasonable. +1 assuming you tested this manually.
                
> Text shell command unnecessarily demands that a SequenceFile's key class be WritableComparable
> ----------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-8395
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8395
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: util
>    Affects Versions: 2.0.0
>            Reporter: Harsh J
>            Assignee: Harsh J
>            Priority: Trivial
>              Labels: shell
>         Attachments: HADOOP-8395.patch
>
>
> Text from Display set of Shell commands (hadoop fs -text), has a strict subclass check
for a sequence-file-header loaded key class to be a subclass of WritableComparable.
> The sequence file writer itself has no such checks (one can create sequence files with
just plain writable keys, comparable is needed for sequence file's sorter alone, which not
all of them use always), and hence its not reasonable for Text command to carry it either.
> We should relax the check and simply just check for "Writable", not "WritableComparable".

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